Floor construction.



No. 799,324. I PATENTBD SEPT. 12, 1905.

' ,.G. GIBBS.

PL'OQR' CONSTRUCTION.' .LPPLIU'II :FILED vMAB. 27. 1905.

UNITED STATES PATENT oEEioE.

GEORGE GIBBS, OF NEW YORK, N. Y.

FLOOR CONSTRUCTION.

Specification of Letters Patent.

Patented Sept. 12, -1905'.

Application filed March 27, 1905. Serial No. 252,233.

skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification,- in which- Figure 1 is a vertical sectional view through i my improved floor construction. Fig. 2 is a sectional view on line 2 2 of Fig. 1. Fig. 3 is a vertical sectional viewof a modified form of iioor construction. Fig. 4 is a sectional view on the line 4 4 of Fig. 3. Fig. 5 is another modified form of floor construction, and Fig. 6 is a sectional view on line 6 6 of Fig. 5.

This invention relates-to a new and useful improvement in door constructions designed particularly for railway rollingstock, although t is obvious that the same can be used in connection. with buildings, bridges, &c.

One of the objects of my invention is to procombination of the several parts, all as will be hereinafter described and afterward pointed out in the claims.

In Figs. 1 and 2, 1 indicates one of the longitudinal sills of a car-underframing; but it will be understood. that in practice there are two or more of such sills employed and also that in some cases there are transverse sills or trahsoms used. On this substructure, irrespective of its type or character, is arranged a corrugated-metal plate 2, the corrugations thereof being angular, as shown. By the. peculiar formation of this plate it Will be noticed that the channels have their mouths contracted, so that when the cementitious material, preferably monolith or a iireproof composition of asbestos or the like, is placed in.

position therein and allowed to harden it is not liable to become displaced even though a fracture might occur which would destroy the continuity of the mass. Securing devices 3 are employed to secure the corrugated plate to the substructure.

These devices are pref- -A erably in the form of bolts whose heads are embedded in the cementitious material. The cementitious material in the form shown in Fig. 1 only fills the channels of the corru' gated plate, thus leaving exposed portions of metal connecting the upper walls of the channels. Upon these exposed metal portions and the upper faces of the cementitious material in place therewith are arranged wooden strips 4, having wood-screws 5 passing therethrough and down into the cementitious material to secure said wooden strips in place. When used as a iiooring for railway rollingstock, the corrugations or channels of the metal strips preferably extend transversely the longitudinal axis of the car-bod y, and the wooden strips are arranged at right angles to these channels, said Wooden strips running parallel to the longitudinal axis of the carbody.

While the construction shown in Figs. 1 and 2 is fireproof and non-heat-conducting to an extentand will deaden the sound to an appreciable degree, it is not altogether proof against electric arcs originating under-the body of the car'and which might'pierce the metal sheet at a point where the top connecting-pieces of metal are exposed and cause an arc to pass up between the Hoor-strips. To obviatc this difficulty, I have -inserted the asbestos strips 8, (see Figs. 3 and 4,) which are driven into the dovetail channels opening through 1the bottom of the metal plate. Any -suitable material other than asbestos could be used in these strips 8.

ln Figs. 5 and 6 I have shown another modifioation in which there is an asbestos or other fireproofsheet 9.applied to the under surface of the corrugated or grooved metal sheet and following the configurations thereof, so as to make a continuous [ireproof and arc-proof sheet under the-metal sheet proper.

Instead of having wooden strips'4(shown in Figs. 1 to 4, inclusive) metallic angles 10 could be employed., as shown in Figs. 5and 6, the bottom flanges of said angles being se- IOO cured in position by screws passingl into the cementitious material.

I am aware that minor changes in the con. struction, arrangement, and combination of the several parts of my device can be made and substituted for those herein shown and described Without in the least departing from the nature and principle of my invention.

Having thus described my invention, what iclaim as new, and desire to secure by Letters Patent, is` A l l 1. A flooring composed of a metallic sheet,- a layer of plastic material on said sheet, and Hoor-supporting wearing-strips on the metallic sheet and filling.. said strips having fastening devices embedded in said filling; substantially as described;

2. A flooring composed of corrugated metallic sheets having plastic materiaion the respective sides thereof, and floor-supporting 'wearing-strips on said plastic material having fastening devices embedded in said material;` substantall \T as describedi 3. A floor composed of a sheet of metal hav- 'ing upwardly and downwardly opening grooves, a. tireproof insulation material filling the upwardly-opening grooves, and a sheet of fireproof material following 'the configurations of the lowersurface of said sheet and occupying the downwardly-opening grooves; substantially as described.

4. A door composed of layers of metallic and non-metallic sheets to form a fireprooi' and heat-resisting surface; substantially as described. Y

In' testimony whereof I hereunto aiiix my signature, in the presence of ytwo witnesses, this 23d day of March, 1905.

GEORGE GIBBS.

lVitnesses:

W. L. MURRAY, H. S. JOHNSON. 

